*/
#include "defs.h"
+#include "native_defs.h"
#include <sys/param.h>
+#include <signal.h>
/* for struct iovec */
#include <sys/uio.h>
#define MA MAX_ARGS
#define SI STACKTRACE_INVALIDATE_CACHE
#define SE STACKTRACE_CAPTURE_ON_ENTER
+#define CST COMPAT_SYSCALL_TYPES
+
+#define SEN(syscall_name) SEN_ ## syscall_name, SYS_FUNC_NAME(sys_ ## syscall_name)
const struct_sysent sysent0[] = {
#include "syscallent.h"
};
#if SUPPORTED_PERSONALITIES > 1
+# include PERSONALITY1_INCLUDE_FUNCS
static const struct_sysent sysent1[] = {
# include "syscallent1.h"
};
#endif
#if SUPPORTED_PERSONALITIES > 2
+# include PERSONALITY2_INCLUDE_FUNCS
static const struct_sysent sysent2[] = {
# include "syscallent2.h"
};
#endif
/* Now undef them since short defines cause wicked namespace pollution. */
+#undef SEN
#undef TD
#undef TF
#undef TI
#undef MA
#undef SI
#undef SE
+#undef CST
/*
* `ioctlent[012].h' files are automatically generated by the auxiliary
static const struct_ioctlent ioctlent1[] = {
# include "ioctlent1.h"
};
+# include PERSONALITY0_INCLUDE_PRINTERS_DECLS
+static const struct_printers printers0 = {
+# include PERSONALITY0_INCLUDE_PRINTERS_DEFS
+};
+# include PERSONALITY1_INCLUDE_PRINTERS_DECLS
+static const struct_printers printers1 = {
+# include PERSONALITY1_INCLUDE_PRINTERS_DEFS
+};
#endif
#if SUPPORTED_PERSONALITIES > 2
static const struct_ioctlent ioctlent2[] = {
# include "ioctlent2.h"
};
+# include PERSONALITY2_INCLUDE_PRINTERS_DECLS
+static const struct_printers printers2 = {
+# include PERSONALITY2_INCLUDE_PRINTERS_DEFS
+};
#endif
enum {
const char *const *errnoent = errnoent0;
const char *const *signalent = signalent0;
const struct_ioctlent *ioctlent = ioctlent0;
+const struct_printers *printers = &printers0;
#endif
+
unsigned nsyscalls = nsyscalls0;
unsigned nerrnos = nerrnos0;
unsigned nsignals = nsignals0;
unsigned nioctlents = nioctlents0;
-unsigned num_quals;
-qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
-
-static const unsigned nsyscall_vec[SUPPORTED_PERSONALITIES] = {
+const unsigned int nsyscall_vec[SUPPORTED_PERSONALITIES] = {
nsyscalls0,
#if SUPPORTED_PERSONALITIES > 1
nsyscalls1,
nsyscalls2,
#endif
};
-static const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES] = {
+const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES] = {
sysent0,
#if SUPPORTED_PERSONALITIES > 1
sysent1,
#endif
};
-enum {
- MAX_NSYSCALLS1 = (nsyscalls0
-#if SUPPORTED_PERSONALITIES > 1
- > nsyscalls1 ? nsyscalls0 : nsyscalls1
-#endif
- ),
- MAX_NSYSCALLS2 = (MAX_NSYSCALLS1
-#if SUPPORTED_PERSONALITIES > 2
- > nsyscalls2 ? MAX_NSYSCALLS1 : nsyscalls2
-#endif
- ),
- MAX_NSYSCALLS = MAX_NSYSCALLS2,
- /* We are ready for arches with up to 255 signals,
- * even though the largest known signo is on MIPS and it is 128.
- * The number of existing syscalls on all arches is
- * larger that 255 anyway, so it is just a pedantic matter.
- */
- MIN_QUALS = MAX_NSYSCALLS > 255 ? MAX_NSYSCALLS : 255
-};
-
#if SUPPORTED_PERSONALITIES > 1
unsigned current_personality;
};
# endif
+# ifndef current_klongsize
+unsigned current_klongsize;
+static const int personality_klongsize[SUPPORTED_PERSONALITIES] = {
+ PERSONALITY0_KLONGSIZE,
+ PERSONALITY1_KLONGSIZE,
+# if SUPPORTED_PERSONALITIES > 2
+ PERSONALITY2_KLONGSIZE,
+# endif
+};
+# endif
+
void
set_personality(int personality)
{
nioctlents = nioctlents0;
signalent = signalent0;
nsignals = nsignals0;
+ printers = &printers0;
break;
case 1:
nioctlents = nioctlents1;
signalent = signalent1;
nsignals = nsignals1;
+ printers = &printers1;
break;
# if SUPPORTED_PERSONALITIES > 2
nioctlents = nioctlents2;
signalent = signalent2;
nsignals = nsignals2;
+ printers = &printers2;
break;
# endif
}
# ifndef current_wordsize
current_wordsize = personality_wordsize[personality];
# endif
+# ifndef current_klongsize
+ current_klongsize = personality_klongsize[personality];
+# endif
}
static void
# elif defined X32
# define PERSONALITY_NAMES {"x32", "32 bit"}
# elif defined AARCH64
-# define PERSONALITY_NAMES {"32-bit", "AArch64"}
+# define PERSONALITY_NAMES {"64 bit", "32 bit"}
# elif defined TILE
# define PERSONALITY_NAMES {"64-bit", "32-bit"}
# endif
}
#endif
-static int qual_syscall(), qual_signal(), qual_desc();
-
-static const struct qual_options {
- unsigned int bitflag;
- const char *option_name;
- int (*qualify)(const char *, int, int);
- const char *argument_name;
-} qual_options[] = {
- { QUAL_TRACE, "trace", qual_syscall, "system call" },
- { QUAL_TRACE, "t", qual_syscall, "system call" },
- { QUAL_ABBREV, "abbrev", qual_syscall, "system call" },
- { QUAL_ABBREV, "a", qual_syscall, "system call" },
- { QUAL_VERBOSE, "verbose", qual_syscall, "system call" },
- { QUAL_VERBOSE, "v", qual_syscall, "system call" },
- { QUAL_RAW, "raw", qual_syscall, "system call" },
- { QUAL_RAW, "x", qual_syscall, "system call" },
- { QUAL_SIGNAL, "signal", qual_signal, "signal" },
- { QUAL_SIGNAL, "signals", qual_signal, "signal" },
- { QUAL_SIGNAL, "s", qual_signal, "signal" },
- { QUAL_READ, "read", qual_desc, "descriptor" },
- { QUAL_READ, "reads", qual_desc, "descriptor" },
- { QUAL_READ, "r", qual_desc, "descriptor" },
- { QUAL_WRITE, "write", qual_desc, "descriptor" },
- { QUAL_WRITE, "writes", qual_desc, "descriptor" },
- { QUAL_WRITE, "w", qual_desc, "descriptor" },
- { 0, NULL, NULL, NULL },
-};
-
-static void
-reallocate_qual(const unsigned int n)
-{
- unsigned p;
- qualbits_t *qp;
- for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
- qp = qual_vec[p] = xreallocarray(qual_vec[p], n,
- sizeof(qualbits_t));
- memset(&qp[num_quals], 0, (n - num_quals) * sizeof(qualbits_t));
- }
- num_quals = n;
-}
-
+#ifdef SYS_socket_subcall
static void
-qualify_one(const unsigned int n, unsigned int bitflag, const int not, const int pers)
-{
- int p;
-
- if (num_quals <= n)
- reallocate_qual(n + 1);
-
- for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
- if (pers == p || pers < 0) {
- if (not)
- qual_vec[p][n] &= ~bitflag;
- else
- qual_vec[p][n] |= bitflag;
- }
- }
-}
-
-static int
-qual_syscall(const char *s, const unsigned int bitflag, const int not)
-{
- int p;
- unsigned int i;
- int rc = -1;
-
- if (*s >= '0' && *s <= '9') {
- i = string_to_uint(s);
- if (i >= MAX_NSYSCALLS)
- return -1;
- qualify_one(i, bitflag, not, -1);
- return 0;
- }
-
- for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
- for (i = 0; i < nsyscall_vec[p]; i++) {
- if (sysent_vec[p][i].sys_name
- && strcmp(s, sysent_vec[p][i].sys_name) == 0
- ) {
- qualify_one(i, bitflag, not, p);
- rc = 0;
- }
- }
- }
-
- return rc;
-}
-
-static int
-qual_signal(const char *s, const unsigned int bitflag, const int not)
-{
- unsigned int i;
-
- if (*s >= '0' && *s <= '9') {
- int signo = string_to_uint(s);
- if (signo < 0 || signo > 255)
- return -1;
- qualify_one(signo, bitflag, not, -1);
- return 0;
- }
- if (strncasecmp(s, "SIG", 3) == 0)
- s += 3;
- for (i = 0; i <= NSIG; i++) {
- if (strcasecmp(s, signame(i) + 3) == 0) {
- qualify_one(i, bitflag, not, -1);
- return 0;
- }
- }
- return -1;
-}
-
-static int
-qual_desc(const char *s, const unsigned int bitflag, const int not)
-{
- if (*s >= '0' && *s <= '9') {
- int desc = string_to_uint(s);
- if (desc < 0 || desc > 0x7fff) /* paranoia */
- return -1;
- qualify_one(desc, bitflag, not, -1);
- return 0;
- }
- return -1;
-}
-
-static int
-lookup_class(const char *s)
-{
- if (strcmp(s, "file") == 0)
- return TRACE_FILE;
- if (strcmp(s, "ipc") == 0)
- return TRACE_IPC;
- if (strcmp(s, "network") == 0)
- return TRACE_NETWORK;
- if (strcmp(s, "process") == 0)
- return TRACE_PROCESS;
- if (strcmp(s, "signal") == 0)
- return TRACE_SIGNAL;
- if (strcmp(s, "desc") == 0)
- return TRACE_DESC;
- if (strcmp(s, "memory") == 0)
- return TRACE_MEMORY;
- return -1;
-}
-
-void
-qualify(const char *s)
+decode_socket_subcall(struct tcb *tcp)
{
- const struct qual_options *opt;
- char *copy;
- const char *p;
- int not;
- unsigned int i;
+ const int call = tcp->u_arg[0];
- if (num_quals == 0)
- reallocate_qual(MIN_QUALS);
-
- opt = &qual_options[0];
- for (i = 0; (p = qual_options[i].option_name); i++) {
- unsigned int len = strlen(p);
- if (strncmp(s, p, len) == 0 && s[len] == '=') {
- opt = &qual_options[i];
- s += len + 1;
- break;
- }
- }
- not = 0;
- if (*s == '!') {
- not = 1;
- s++;
- }
- if (strcmp(s, "none") == 0) {
- not = 1 - not;
- s = "all";
- }
- if (strcmp(s, "all") == 0) {
- for (i = 0; i < num_quals; i++) {
- qualify_one(i, opt->bitflag, not, -1);
- }
+ if (call < 1 || call >= SYS_socket_nsubcalls)
return;
- }
- for (i = 0; i < num_quals; i++) {
- qualify_one(i, opt->bitflag, !not, -1);
- }
- copy = xstrdup(s);
- for (p = strtok(copy, ","); p; p = strtok(NULL, ",")) {
- int n;
- if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
- unsigned pers;
- for (pers = 0; pers < SUPPORTED_PERSONALITIES; pers++) {
- for (i = 0; i < nsyscall_vec[pers]; i++)
- if (sysent_vec[pers][i].sys_flags & n)
- qualify_one(i, opt->bitflag, not, pers);
- }
- continue;
- }
- if (opt->qualify(p, opt->bitflag, not)) {
- error_msg_and_die("invalid %s '%s'",
- opt->argument_name, p);
- }
- }
- free(copy);
- return;
-}
-#ifdef SYS_socket_subcall
-static void
-decode_socket_subcall(struct tcb *tcp)
-{
- unsigned long addr;
- unsigned int n;
+ const kernel_scno_t scno = SYS_socket_subcall + call;
+ const unsigned int nargs = sysent[scno].nargs;
+ uint64_t buf[nargs];
- if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_socket_nsubcalls)
+ if (umoven(tcp, tcp->u_arg[1], nargs * current_wordsize, buf) < 0)
return;
- tcp->scno = SYS_socket_subcall + tcp->u_arg[0];
- tcp->qual_flg = qual_flags[tcp->scno];
- tcp->s_ent = &sysent[tcp->scno];
- addr = tcp->u_arg[1];
- n = tcp->s_ent->nargs;
- if (sizeof(tcp->u_arg[0]) == current_wordsize) {
- memset(tcp->u_arg, 0, n * sizeof(tcp->u_arg[0]));
- (void) umoven(tcp, addr, n * sizeof(tcp->u_arg[0]), tcp->u_arg);
- } else {
- unsigned int args[n];
- unsigned int i;
+ tcp->scno = scno;
+ tcp->qual_flg = qual_flags(scno);
+ tcp->s_ent = &sysent[scno];
- memset(args, 0, sizeof(args));
- (void) umove(tcp, addr, &args);
- for (i = 0; i < n; ++i)
- tcp->u_arg[i] = args[i];
- }
+ unsigned int i;
+ for (i = 0; i < nargs; ++i)
+ tcp->u_arg[i] = (sizeof(uint32_t) == current_wordsize)
+ ? ((uint32_t *) (void *) buf)[i] : buf[i];
}
#endif
static void
decode_ipc_subcall(struct tcb *tcp)
{
- unsigned int i, n;
+ unsigned int call = tcp->u_arg[0];
+ const unsigned int version = call >> 16;
- if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_ipc_nsubcalls)
+ if (version) {
+# if defined S390 || defined S390X
return;
+# else
+# ifdef SPARC64
+ if (current_wordsize == 8)
+ return;
+# endif
+ set_tcb_priv_ulong(tcp, version);
+ call &= 0xffff;
+# endif
+ }
+
+ switch (call) {
+ case 1: case 2: case 3: case 4:
+ case 11: case 12: case 13: case 14:
+ case 21: case 22: case 23: case 24:
+ break;
+ default:
+ return;
+ }
- tcp->scno = SYS_ipc_subcall + tcp->u_arg[0];
- tcp->qual_flg = qual_flags[tcp->scno];
+ tcp->scno = SYS_ipc_subcall + call;
+ tcp->qual_flg = qual_flags(tcp->scno);
tcp->s_ent = &sysent[tcp->scno];
- n = tcp->s_ent->nargs;
+
+ const unsigned int n = tcp->s_ent->nargs;
+ unsigned int i;
for (i = 0; i < n; i++)
tcp->u_arg[i] = tcp->u_arg[i + 1];
}
static void
decode_mips_subcall(struct tcb *tcp)
{
- if (!SCNO_IS_VALID(tcp->u_arg[0]))
+ if (!scno_is_valid(tcp->u_arg[0]))
return;
tcp->scno = tcp->u_arg[0];
- tcp->qual_flg = qual_flags[tcp->scno];
+ tcp->qual_flg = qual_flags(tcp->scno);
tcp->s_ent = &sysent[tcp->scno];
memmove(&tcp->u_arg[0], &tcp->u_arg[1],
sizeof(tcp->u_arg) - sizeof(tcp->u_arg[0]));
/*
* Fetching the last arg of 7-arg syscalls (fadvise64_64
- * and sync_file_range) would require additional code,
+ * and sync_file_range) requires additional code,
* see linux/mips/get_syscall_args.c
*/
-}
-
-SYS_FUNC(syscall)
-{
- return printargs(tcp);
-}
-#endif
-
-int
-printargs(struct tcb *tcp)
-{
- if (entering(tcp)) {
- int i;
- int n = tcp->s_ent->nargs;
- for (i = 0; i < n; i++)
- tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
+ if (tcp->s_ent->nargs == MAX_ARGS) {
+ if (umoven(tcp,
+ mips_REG_SP + MAX_ARGS * sizeof(tcp->u_arg[0]),
+ sizeof(tcp->u_arg[0]),
+ &tcp->u_arg[MAX_ARGS - 1]) < 0)
+ tcp->u_arg[MAX_ARGS - 1] = 0;
}
- return 0;
-}
-
-int
-printargs_lu(struct tcb *tcp)
-{
- if (entering(tcp)) {
- int i;
- int n = tcp->s_ent->nargs;
- for (i = 0; i < n; i++)
- tprintf("%s%lu", i ? ", " : "", tcp->u_arg[i]);
- }
- return 0;
-}
-
-int
-printargs_ld(struct tcb *tcp)
-{
- if (entering(tcp)) {
- int i;
- int n = tcp->s_ent->nargs;
- for (i = 0; i < n; i++)
- tprintf("%s%ld", i ? ", " : "", tcp->u_arg[i]);
- }
- return 0;
}
+#endif /* LINUX_MIPSO32 */
static void
dumpio(struct tcb *tcp)
{
- int (*func)();
-
if (syserror(tcp))
return;
- if ((unsigned long) tcp->u_arg[0] >= num_quals)
- return;
- func = tcp->s_ent->sys_func;
- if (func == printargs)
+
+ int fd = tcp->u_arg[0];
+ if (fd < 0)
return;
- if (qual_flags[tcp->u_arg[0]] & QUAL_READ) {
- if (func == sys_read ||
- func == sys_pread ||
- func == sys_recv ||
- func == sys_recvfrom) {
+
+ if (is_number_in_set(fd, &read_set)) {
+ switch (tcp->s_ent->sen) {
+ case SEN_read:
+ case SEN_pread:
+ case SEN_recv:
+ case SEN_recvfrom:
+ case SEN_mq_timedreceive:
dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
return;
- } else if (func == sys_readv) {
- dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
+ case SEN_readv:
+ case SEN_preadv:
+ case SEN_preadv2:
+ dumpiov_upto(tcp, tcp->u_arg[2], tcp->u_arg[1],
+ tcp->u_rval);
return;
-#if HAVE_SENDMSG
- } else if (func == sys_recvmsg) {
- dumpiov_in_msghdr(tcp, tcp->u_arg[1]);
+ case SEN_recvmsg:
+ dumpiov_in_msghdr(tcp, tcp->u_arg[1], tcp->u_rval);
return;
- } else if (func == sys_recvmmsg) {
+ case SEN_recvmmsg:
dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
return;
-#endif
}
}
- if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE) {
- if (func == sys_write ||
- func == sys_pwrite ||
- func == sys_send ||
- func == sys_sendto)
+ if (is_number_in_set(fd, &write_set)) {
+ switch (tcp->s_ent->sen) {
+ case SEN_write:
+ case SEN_pwrite:
+ case SEN_send:
+ case SEN_sendto:
+ case SEN_mq_timedsend:
dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
- else if (func == sys_writev)
- dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
-#if HAVE_SENDMSG
- else if (func == sys_sendmsg)
- dumpiov_in_msghdr(tcp, tcp->u_arg[1]);
- else if (func == sys_sendmmsg)
+ break;
+ case SEN_writev:
+ case SEN_pwritev:
+ case SEN_pwritev2:
+ case SEN_vmsplice:
+ dumpiov_upto(tcp, tcp->u_arg[2], tcp->u_arg[1], -1);
+ break;
+ case SEN_sendmsg:
+ dumpiov_in_msghdr(tcp, tcp->u_arg[1], -1);
+ break;
+ case SEN_sendmmsg:
dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
-#endif
+ break;
+ }
}
}
* Shuffle syscall numbers so that we don't have huge gaps in syscall table.
* The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
*/
-#if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
-static long
-shuffle_scno(unsigned long scno)
+static kernel_scno_t
+shuffle_scno(kernel_scno_t scno)
{
+#if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
if (scno < ARM_FIRST_SHUFFLED_SYSCALL)
return scno;
if (scno == 0x000ffff0)
return ARM_FIRST_SHUFFLED_SYSCALL;
-#define ARM_SECOND_SHUFFLED_SYSCALL (ARM_FIRST_SHUFFLED_SYSCALL + 1)
+# define ARM_SECOND_SHUFFLED_SYSCALL (ARM_FIRST_SHUFFLED_SYSCALL + 1)
/*
* Is it ARM specific syscall?
* Swap [0x000f0000, 0x000f0000 + LAST_SPECIAL] range
if (scno <= ARM_SECOND_SHUFFLED_SYSCALL + ARM_LAST_SPECIAL_SYSCALL) {
return scno + 0x000f0000 - ARM_SECOND_SHUFFLED_SYSCALL;
}
+#endif /* ARM || AARCH64 */
return scno;
}
-#else
-# define shuffle_scno(scno) ((long)(scno))
-#endif
-static char*
-undefined_scno_name(struct tcb *tcp)
+const char *
+err_name(unsigned long err)
{
- static char buf[sizeof("syscall_%lu") + sizeof(long)*3];
+ if ((err < nerrnos) && errnoent[err])
+ return errnoent[err];
- sprintf(buf, "syscall_%lu", shuffle_scno(tcp->scno));
- return buf;
+ return NULL;
}
static long get_regs_error;
static int get_syscall_args(struct tcb *);
static int get_syscall_result(struct tcb *);
+static int arch_get_scno(struct tcb *tcp);
+static int arch_set_scno(struct tcb *, kernel_scno_t);
+static void get_error(struct tcb *, const bool);
+static int arch_set_error(struct tcb *);
+
+struct fault_opts *fault_vec[SUPPORTED_PERSONALITIES];
+
+static struct fault_opts *
+tcb_fault_opts(struct tcb *tcp)
+{
+ return (scno_in_range(tcp->scno) && tcp->fault_vec[current_personality])
+ ? &tcp->fault_vec[current_personality][tcp->scno] : NULL;
+}
+
+
+static long
+inject_syscall_fault_entering(struct tcb *tcp)
+{
+ if (!tcp->fault_vec[current_personality]) {
+ tcp->fault_vec[current_personality] =
+ xcalloc(nsyscalls, sizeof(**fault_vec));
+ memcpy(tcp->fault_vec[current_personality],
+ fault_vec[current_personality],
+ nsyscalls * sizeof(**fault_vec));
+ }
+
+ struct fault_opts *opts = tcb_fault_opts(tcp);
+
+ if (!opts || opts->first == 0)
+ return 0;
+
+ --opts->first;
+
+ if (opts->first != 0)
+ return 0;
+
+ opts->first = opts->step;
+
+ if (!arch_set_scno(tcp, -1))
+ tcp->flags |= TCB_FAULT_INJ;
+
+ return 0;
+}
+
+static long
+update_syscall_fault_exiting(struct tcb *tcp)
+{
+ struct fault_opts *opts = tcb_fault_opts(tcp);
+
+ if (opts && opts->err && tcp->u_error != opts->err) {
+ unsigned long u_error = tcp->u_error;
+ tcp->u_error = opts->err;
+ if (arch_set_error(tcp))
+ tcp->u_error = u_error;
+ }
+
+ return 0;
+}
static int
trace_syscall_entering(struct tcb *tcp)
if (res != 1) {
printleader(tcp);
- if (scno_good != 1)
- tprints("????" /* anti-trigraph gap */ "(");
- else if (tcp->qual_flg & UNDEFINED_SCNO)
- tprintf("%s(", undefined_scno_name(tcp));
- else
- tprintf("%s(", tcp->s_ent->sys_name);
+ tprintf("%s(", scno_good == 1 ? tcp->s_ent->sys_name : "????");
/*
* " <unavailable>" will be added later by the code which
* detects ptrace errors.
}
#ifdef LINUX_MIPSO32
- if (sys_syscall == tcp->s_ent->sys_func)
+ if (SEN_syscall == tcp->s_ent->sen)
decode_mips_subcall(tcp);
#endif
- if ( sys_execve == tcp->s_ent->sys_func
-# if defined(SPARC) || defined(SPARC64)
- || sys_execv == tcp->s_ent->sys_func
-# endif
- ) {
- hide_log_until_execve = 0;
- }
-
#if defined(SYS_socket_subcall) || defined(SYS_ipc_subcall)
- while (1) {
+ switch (tcp->s_ent->sen) {
# ifdef SYS_socket_subcall
- if (tcp->s_ent->sys_func == sys_socketcall) {
+ case SEN_socketcall:
decode_socket_subcall(tcp);
break;
- }
# endif
# ifdef SYS_ipc_subcall
- if (tcp->s_ent->sys_func == sys_ipc) {
+ case SEN_ipc:
decode_ipc_subcall(tcp);
break;
- }
# endif
- break;
}
#endif
+ /* Restrain from fault injection while the trace executes strace code. */
+ if (hide_log(tcp)) {
+ tcp->qual_flg &= ~QUAL_FAULT;
+ }
+
+ switch (tcp->s_ent->sen) {
+ case SEN_execve:
+ case SEN_execveat:
+#if defined SPARC || defined SPARC64
+ case SEN_execv:
+#endif
+ tcp->flags &= ~TCB_HIDE_LOG;
+ break;
+ }
+
if (!(tcp->qual_flg & QUAL_TRACE)
|| (tracing_paths && !pathtrace_match(tcp))
) {
tcp->flags |= TCB_INSYSCALL | TCB_FILTERED;
+ tcp->sys_func_rval = 0;
return 0;
}
tcp->flags &= ~TCB_FILTERED;
- if (cflag == CFLAG_ONLY_STATS || hide_log_until_execve) {
+ if (hide_log(tcp)) {
+ res = 0;
+ goto ret;
+ }
+
+ if (tcp->qual_flg & QUAL_FAULT)
+ inject_syscall_fault_entering(tcp);
+
+ if (cflag == CFLAG_ONLY_STATS) {
res = 0;
goto ret;
}
#endif
printleader(tcp);
- if (tcp->qual_flg & UNDEFINED_SCNO)
- tprintf("%s(", undefined_scno_name(tcp));
- else
- tprintf("%s(", tcp->s_ent->sys_name);
- if ((tcp->qual_flg & QUAL_RAW) && tcp->s_ent->sys_func != sys_exit)
+ tprintf("%s(", tcp->s_ent->sys_name);
+ if (tcp->qual_flg & QUAL_RAW)
res = printargs(tcp);
else
res = tcp->s_ent->sys_func(tcp);
fflush(tcp->outf);
ret:
tcp->flags |= TCB_INSYSCALL;
+ tcp->sys_func_rval = res;
/* Measure the entrance time as late as possible to avoid errors. */
if (Tflag || cflag)
gettimeofday(&tcp->etime, NULL);
return res;
}
+static bool
+syscall_fault_injected(struct tcb *tcp)
+{
+ return tcp->flags & TCB_FAULT_INJ;
+}
+
static int
trace_syscall_exiting(struct tcb *tcp)
{
int sys_res;
struct timeval tv;
int res;
- long u_error;
+ unsigned long u_error;
+ const char *u_error_str;
/* Measure the exit time as early as possible to avoid errors. */
if (Tflag || cflag)
update_personality(tcp, tcp->currpers);
#endif
res = (get_regs_error ? -1 : get_syscall_result(tcp));
- if (res == 1) {
- if (filtered(tcp) || hide_log_until_execve)
- goto ret;
- }
+ if (filtered(tcp) || hide_log(tcp))
+ goto ret;
+
+ if (syserror(tcp) && syscall_fault_injected(tcp))
+ update_syscall_fault_exiting(tcp);
if (cflag) {
count_syscall(tcp, &tv);
if ((followfork < 2 && printing_tcp != tcp) || (tcp->flags & TCB_REPRINT)) {
tcp->flags &= ~TCB_REPRINT;
printleader(tcp);
- if (tcp->qual_flg & UNDEFINED_SCNO)
- tprintf("<... %s resumed> ", undefined_scno_name(tcp));
- else
- tprintf("<... %s resumed> ", tcp->s_ent->sys_name);
+ tprintf("<... %s resumed> ", tcp->s_ent->sys_name);
}
printing_tcp = tcp;
tabto();
tprints("= ? <unavailable>\n");
line_ended();
- tcp->flags &= ~TCB_INSYSCALL;
+ tcp->flags &= ~(TCB_INSYSCALL | TCB_FAULT_INJ);
+ tcp->sys_func_rval = 0;
+ free_tcb_priv_data(tcp);
return res;
}
tcp->s_prev_ent = tcp->s_ent;
*/
if (not_failing_only && tcp->u_error)
goto ret; /* ignore failed syscalls */
- sys_res = tcp->s_ent->sys_func(tcp);
+ if (tcp->sys_func_rval & RVAL_DECODED)
+ sys_res = tcp->sys_func_rval;
+ else
+ sys_res = tcp->s_ent->sys_func(tcp);
}
tprints(") ");
tabto();
u_error = tcp->u_error;
+
if (tcp->qual_flg & QUAL_RAW) {
- if (u_error)
- tprintf("= -1 (errno %ld)", u_error);
- else
- tprintf("= %#lx", tcp->u_rval);
+ if (u_error) {
+ tprintf("= -1 (errno %lu)", u_error);
+ if (syscall_fault_injected(tcp))
+ tprints(" (INJECTED)");
+ } else {
+ tprintf("= %#" PRI_krx, tcp->u_rval);
+ }
}
else if (!(sys_res & RVAL_NONE) && u_error) {
switch (u_error) {
tprints("= ? ERESTART_RESTARTBLOCK (Interrupted by signal)");
break;
default:
- if ((unsigned long) u_error < nerrnos
- && errnoent[u_error])
- tprintf("= -1 %s (%s)", errnoent[u_error],
- strerror(u_error));
+ u_error_str = err_name(u_error);
+ if (u_error_str)
+ tprintf("= -1 %s (%s)",
+ u_error_str, strerror(u_error));
else
- tprintf("= -1 ERRNO_%lu (%s)", u_error,
- strerror(u_error));
+ tprintf("= -1 %lu (%s)",
+ u_error, strerror(u_error));
break;
}
+ if (syscall_fault_injected(tcp))
+ tprintf(" (INJECTED)");
if ((sys_res & RVAL_STR) && tcp->auxstr)
tprintf(" (%s)", tcp->auxstr);
}
switch (sys_res & RVAL_MASK) {
case RVAL_HEX:
#if SUPPORTED_PERSONALITIES > 1
- if (current_wordsize < sizeof(long))
+ if (current_wordsize < sizeof(tcp->u_rval))
tprintf("= %#x",
(unsigned int) tcp->u_rval);
else
#endif
- tprintf("= %#lx", tcp->u_rval);
+ tprintf("= %#" PRI_krx, tcp->u_rval);
break;
case RVAL_OCTAL:
- tprintf("= %#lo", tcp->u_rval);
+ tprints("= ");
+ print_numeric_long_umask(tcp->u_rval);
break;
case RVAL_UDECIMAL:
- tprintf("= %lu", tcp->u_rval);
+#if SUPPORTED_PERSONALITIES > 1
+ if (current_wordsize < sizeof(tcp->u_rval))
+ tprintf("= %u",
+ (unsigned int) tcp->u_rval);
+ else
+#endif
+ tprintf("= %" PRI_kru, tcp->u_rval);
break;
case RVAL_DECIMAL:
- tprintf("= %ld", tcp->u_rval);
+ tprintf("= %" PRI_krd, tcp->u_rval);
break;
case RVAL_FD:
if (show_fd_path) {
printfd(tcp, tcp->u_rval);
}
else
- tprintf("= %ld", tcp->u_rval);
+ tprintf("= %" PRI_krd, tcp->u_rval);
break;
-#if defined(LINUX_MIPSN32) || defined(X32)
+#if HAVE_STRUCT_TCB_EXT_ARG
/*
case RVAL_LHEX:
tprintf("= %#llx", tcp->u_lrval);
tprintf("= %lld", tcp->u_lrval);
break;
*/
-#endif
+#endif /* HAVE_STRUCT_TCB_EXT_ARG */
default:
error_msg("invalid rval format");
break;
#endif
ret:
- tcp->flags &= ~TCB_INSYSCALL;
+ tcp->flags &= ~(TCB_INSYSCALL | TCB_FAULT_INJ);
+ tcp->sys_func_rval = 0;
+ free_tcb_priv_data(tcp);
return 0;
}
trace_syscall_exiting(tcp) : trace_syscall_entering(tcp);
}
-/*
- * Cannot rely on __kernel_[u]long_t being defined,
- * it is quite a recent feature of <asm/posix_types.h>.
- */
-#ifdef __kernel_long_t
-typedef __kernel_long_t kernel_long_t;
-typedef __kernel_ulong_t kernel_ulong_t;
-#else
-# ifdef X32
-typedef long long kernel_long_t;
-typedef unsigned long long kernel_ulong_t;
-# else
-typedef long kernel_long_t;
-typedef unsigned long kernel_ulong_t;
-# endif
-#endif
+bool
+is_erestart(struct tcb *tcp)
+{
+ switch (tcp->u_error) {
+ case ERESTARTSYS:
+ case ERESTARTNOINTR:
+ case ERESTARTNOHAND:
+ case ERESTART_RESTARTBLOCK:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static unsigned long saved_u_error;
+
+void
+temporarily_clear_syserror(struct tcb *tcp)
+{
+ saved_u_error = tcp->u_error;
+ tcp->u_error = 0;
+}
+
+void
+restore_cleared_syserror(struct tcb *tcp)
+{
+ tcp->u_error = saved_u_error;
+}
/*
* Check the syscall return value register value for whether it is
/* Linux kernel defines MAX_ERRNO to 4095. */
kernel_ulong_t max = -(kernel_long_t) 4095;
-#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
- if (current_wordsize < sizeof(val)) {
- val = (uint32_t) val;
- max = (uint32_t) max;
- }
-#elif defined X32
- /*
- * current_wordsize is 4 even in personality 0 (native X32)
- * but truncation _must not_ be done in it.
- * can't check current_wordsize here!
- */
- if (current_personality != 0) {
+#ifndef current_klongsize
+ if (current_klongsize < sizeof(val)) {
val = (uint32_t) val;
max = (uint32_t) max;
}
-#endif
+#endif /* !current_klongsize */
return val >= max;
}
void
print_pc(struct tcb *tcp)
{
- const char *fmt;
- const char *bad;
-
-#ifdef current_wordsize
-# define pc_wordsize current_wordsize
+#if defined ARCH_PC_REG
+# define ARCH_GET_PC 0
+#elif defined ARCH_PC_PEEK_ADDR
+ kernel_ureg_t pc;
+# define ARCH_PC_REG pc
+# define ARCH_GET_PC upeek(tcp->pid, ARCH_PC_PEEK_ADDR, &pc)
#else
-# define pc_wordsize personality_wordsize[tcp->currpers]
+# error Neither ARCH_PC_REG nor ARCH_PC_PEEK_ADDR is defined
#endif
-
- if (pc_wordsize == 4) {
- fmt = "[%08lx] ";
- bad = "[????????] ";
- } else {
- fmt = "[%016lx] ";
- bad = "[????????????????] ";
- }
-
-#undef pc_wordsize
-#define PRINTBADPC tprints(bad)
-
- if (get_regs_error) {
- PRINTBADPC;
- return;
- }
-
-#include "print_pc.c"
+ if (get_regs_error || ARCH_GET_PC)
+ tprints(current_wordsize == 4 ? "[????????] "
+ : "[????????????????] ");
+ else
+ tprintf(current_wordsize == 4
+ ? "[%08" PRI_krx "] " : "[%016" PRI_krx "] ",
+ (kernel_ureg_t) ARCH_PC_REG);
}
-#if defined X86_64 || defined POWERPC
-# include "getregs_old.c"
-#endif
+#include "getregs_old.h"
-#if defined ARCH_REGS_FOR_GETREGSET
+#undef ptrace_getregset_or_getregs
+#undef ptrace_setregset_or_setregs
+#ifdef ARCH_REGS_FOR_GETREGSET
+
+# define ptrace_getregset_or_getregs ptrace_getregset
static long
-get_regset(pid_t pid)
+ptrace_getregset(pid_t pid)
{
# ifdef ARCH_IOVEC_FOR_GETREGSET
/* variable iovec */
# endif
}
-#endif /* ARCH_REGS_FOR_GETREGSET */
+
+# ifndef HAVE_GETREGS_OLD
+# define ptrace_setregset_or_setregs ptrace_setregset
+static int
+ptrace_setregset(pid_t pid)
+{
+# ifdef ARCH_IOVEC_FOR_GETREGSET
+ /* variable iovec */
+ return ptrace(PTRACE_SETREGSET, pid, NT_PRSTATUS,
+ &ARCH_IOVEC_FOR_GETREGSET);
+# else
+ /* constant iovec */
+ static struct iovec io = {
+ .iov_base = &ARCH_REGS_FOR_GETREGSET,
+ .iov_len = sizeof(ARCH_REGS_FOR_GETREGSET)
+ };
+ return ptrace(PTRACE_SETREGSET, pid, NT_PRSTATUS, &io);
+# endif
+}
+# endif /* !HAVE_GETREGS_OLD */
+
+#elif defined ARCH_REGS_FOR_GETREGS
+
+# define ptrace_getregset_or_getregs ptrace_getregs
+static long
+ptrace_getregs(pid_t pid)
+{
+# if defined SPARC || defined SPARC64
+ /* SPARC systems have the meaning of data and addr reversed */
+ return ptrace(PTRACE_GETREGS, pid, (void *) &ARCH_REGS_FOR_GETREGS, 0);
+# else
+ return ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
+# endif
+}
+
+# ifndef HAVE_GETREGS_OLD
+# define ptrace_setregset_or_setregs ptrace_setregs
+static int
+ptrace_setregs(pid_t pid)
+{
+# if defined SPARC || defined SPARC64
+ /* SPARC systems have the meaning of data and addr reversed */
+ return ptrace(PTRACE_SETREGS, pid, (void *) &ARCH_REGS_FOR_GETREGS, 0);
+# else
+ return ptrace(PTRACE_SETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
+# endif
+}
+# endif /* !HAVE_GETREGS_OLD */
+
+#endif /* ARCH_REGS_FOR_GETREGSET || ARCH_REGS_FOR_GETREGS */
void
get_regs(pid_t pid)
{
-#ifdef ARCH_REGS_FOR_GETREGSET
-# ifdef X86_64
- /* Try PTRACE_GETREGSET first, fallback to PTRACE_GETREGS. */
- static int getregset_support;
+#undef USE_GET_SYSCALL_RESULT_REGS
+#ifdef ptrace_getregset_or_getregs
- if (getregset_support >= 0) {
- get_regs_error = get_regset(pid);
- if (getregset_support > 0)
- return;
+# ifdef HAVE_GETREGS_OLD
+ /*
+ * Try PTRACE_GETREGSET/PTRACE_GETREGS first,
+ * fallback to getregs_old.
+ */
+ static int use_getregs_old;
+ if (use_getregs_old < 0) {
+ get_regs_error = ptrace_getregset_or_getregs(pid);
+ return;
+ } else if (use_getregs_old == 0) {
+ get_regs_error = ptrace_getregset_or_getregs(pid);
if (get_regs_error >= 0) {
- getregset_support = 1;
+ use_getregs_old = -1;
return;
}
if (errno == EPERM || errno == ESRCH)
return;
- getregset_support = -1;
+ use_getregs_old = 1;
}
- getregs_old(pid);
-# else /* !X86_64 */
- /* Assume that PTRACE_GETREGSET works. */
- get_regs_error = get_regset(pid);
-# endif
-#elif defined ARCH_REGS_FOR_GETREGS
-# if defined SPARC || defined SPARC64
- /* SPARC systems have the meaning of data and addr reversed */
- get_regs_error = ptrace(PTRACE_GETREGS, pid, (char *)&ARCH_REGS_FOR_GETREGS, 0);
-# elif defined POWERPC
- static bool old_kernel = 0;
- if (old_kernel)
- goto old;
- get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
- if (get_regs_error && errno == EIO) {
- old_kernel = 1;
- old:
- get_regs_error = getregs_old(pid);
- }
-# else
- /* Assume that PTRACE_GETREGS works. */
- get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
-# endif
+ get_regs_error = getregs_old(pid);
+# else /* !HAVE_GETREGS_OLD */
+ /* Assume that PTRACE_GETREGSET/PTRACE_GETREGS works. */
+ get_regs_error = ptrace_getregset_or_getregs(pid);
+# endif /* !HAVE_GETREGS_OLD */
-#else /* !ARCH_REGS_FOR_GETREGSET && !ARCH_REGS_FOR_GETREGS */
-# warning get_regs is not implemented for this architecture yet
+#else /* !ptrace_getregset_or_getregs */
+
+# define USE_GET_SYSCALL_RESULT_REGS 1
+# warning get_regs is not implemented for this architecture yet
get_regs_error = 0;
-#endif
+
+#endif /* !ptrace_getregset_or_getregs */
}
-/* Returns:
+#ifdef ptrace_setregset_or_setregs
+static int
+set_regs(pid_t pid)
+{
+ return ptrace_setregset_or_setregs(pid);
+}
+#endif /* ptrace_setregset_or_setregs */
+
+struct sysent_buf {
+ struct tcb *tcp;
+ struct_sysent ent;
+ char buf[sizeof("syscall_%lu") + sizeof(kernel_scno_t) * 3];
+};
+
+static void
+free_sysent_buf(void *ptr)
+{
+ struct sysent_buf *s = ptr;
+ s->tcp->s_prev_ent = s->tcp->s_ent = NULL;
+ free(ptr);
+}
+
+/*
+ * Returns:
* 0: "ignore this ptrace stop", bail out of trace_syscall_entering() silently.
* 1: ok, continue in trace_syscall_entering().
* other: error, trace_syscall_entering() should print error indicator
if (get_regs_error)
return -1;
- long scno = 0;
+ int rc = arch_get_scno(tcp);
+ if (rc != 1)
+ return rc;
-#include "get_scno.c"
-
- tcp->scno = scno;
- if (SCNO_IS_VALID(tcp->scno)) {
- tcp->s_ent = &sysent[scno];
- tcp->qual_flg = qual_flags[scno];
+ if (scno_is_valid(tcp->scno)) {
+ tcp->s_ent = &sysent[tcp->scno];
+ tcp->qual_flg = qual_flags(tcp->scno);
} else {
- static const struct_sysent unknown = {
- .nargs = MAX_ARGS,
- .sys_flags = 0,
- .sys_func = printargs,
- .sys_name = "system call",
- };
- tcp->s_ent = &unknown;
- tcp->qual_flg = UNDEFINED_SCNO | QUAL_RAW | DEFAULT_QUAL_FLAGS;
+ struct sysent_buf *s = xcalloc(1, sizeof(*s));
+
+ s->tcp = tcp;
+ s->ent.nargs = MAX_ARGS;
+ s->ent.sen = SEN_printargs;
+ s->ent.sys_func = printargs;
+ s->ent.sys_name = s->buf;
+ sprintf(s->buf, "syscall_%" PRI_kru, shuffle_scno(tcp->scno));
+
+ tcp->s_ent = &s->ent;
+ tcp->qual_flg = QUAL_RAW | DEFAULT_QUAL_FLAGS;
+
+ set_tcb_priv_data(tcp, s, free_sysent_buf);
+
if (debug_flag)
- error_msg("pid %d invalid syscall %ld", tcp->pid, scno);
+ error_msg("pid %d invalid syscall %" PRI_krd,
+ tcp->pid, tcp->scno);
}
return 1;
}
-/* Return -1 on error or 1 on success (never 0!) */
-static int
-get_syscall_args(struct tcb *tcp)
-{
-#include "get_syscall_args.c"
- return 1;
-}
-
-static void
-get_error(struct tcb *tcp)
-{
- const bool check_errno = !(tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS);
- tcp->u_error = 0;
-
-#include "get_error.c"
-}
+#ifdef USE_GET_SYSCALL_RESULT_REGS
+static int get_syscall_result_regs(struct tcb *);
+#endif
/* Returns:
* 1: ok, continue in trace_syscall_exiting().
static int
get_syscall_result(struct tcb *tcp)
{
-#if defined ARCH_REGS_FOR_GETREGSET || defined ARCH_REGS_FOR_GETREGS
- /* already done by get_regs */
-#else
-# include "get_syscall_result.c"
+#ifdef USE_GET_SYSCALL_RESULT_REGS
+ if (get_syscall_result_regs(tcp))
+ return -1;
#endif
- get_error(tcp);
+ tcp->u_error = 0;
+ get_error(tcp, !(tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS));
+
return 1;
}
+
+#include "get_scno.c"
+#include "set_scno.c"
+#include "get_syscall_args.c"
+#ifdef USE_GET_SYSCALL_RESULT_REGS
+# include "get_syscall_result.c"
+#endif
+#include "get_error.c"
+#include "set_error.c"
+#ifdef HAVE_GETREGS_OLD
+# include "getregs_old.c"
+#endif
+
+const char *
+syscall_name(kernel_scno_t scno)
+{
+#if defined X32_PERSONALITY_NUMBER && defined __X32_SYSCALL_BIT
+ if (current_personality == X32_PERSONALITY_NUMBER)
+ scno &= ~__X32_SYSCALL_BIT;
+#endif
+ return scno_is_valid(scno) ? sysent[scno].sys_name: NULL;
+}
projects / strace / blobdiff